(under subclass 473) Subject matter having means adapted to be placed on or near the track-rails, so as to be exploded by a passing train as a warning of danger ahead.
(1) Note. Only the structure of the container which holds the explosive substance is here classified. The explosive itself will be found in Class 149, Explosive and Thermic Compositions or Charges.
SEE OR SEARCH THIS CLASS, SUBCLASS:
210+, for detonating signals placed in position by the movement of a switch, switch-stand, or visual signal.
SEE OR SEARCH CLASS
102, Ammunition and Explosives, appropriate subclasses for containers not specially designed for railway use and
336, for red fire fuses used by brakeman and others in railway signaling. 149, Explosive and Thermic Compositions or Charges, appropriate subclasses for explosive or ignitable compositions which may be useful for signal purposes.
